Quelpr
2 marksRespiration

CSEC Biology · January 2010 · Paper 2 · Question 2(d)

A person who is exercising vigorously breathes more deeply and rapidly than someone who is resting. Give TWO reasons why this is necessary.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)(i)Name the structures labelled P, Q, R and S in Figure 3.[4 marks]
  2. 2(a)(ii)Identify the gases indicated by the arrows, A and B, in Figure 3.[2 marks]
  3. 2(b)(i)Name the process by which gases move in the directions shown by the arrows.[1 mark]
  4. 2(b)(ii)Identify ONE feature illustrated in the diagram which shows that the alveolus is suitable for gaseous exchange.[1 mark]
  5. 2(c)What is the role of breathing in the movement of the gases illustrated in Figure 3?[2 marks]
  6. 2(e)Explain how cigarette smoking can reduce the efficiency of the lungs.[3 marks]

More practice: the rest of this paper · more Respiration questions · all CSEC Biology past papers